Re: [IBIS-Users] How i use 100 ohm receiver resistence in my models

Hello Akhilesh

Does your tool support Series Current ? you can try to use the series
current the curve is linear (resistor).
Have you tried to put the resistor outside the model between the pins
(this can help you workaround the problem) ?

Itzik

Tom Dagostino wrote:

>In the IBIS Version is in the file? It needs to be at least version 3.0 or
>you will get parser errors.
>
>Tom Dagostino
>Teraspeed Consulting Group LLC
>503-430-1065
>tom@teraspeed.com
>www.teraspeed.com
>
>-----Original Message-----
>From: Akhilesh CHANDRA [mailto:akhilesh.chandra@st.com]
>Sent: Tuesday, May 18, 2004 9:51 PM
>To: tom@teraspeed.com
>Cc: ibis-users; Akhilesh CHANDRA
>Subject: Re: [IBIS-Users] How i use 100 ohm receiver resistence in my
>models
>
>
>Hello Tom,
>
> When I put series resistence between the pins in the following way,
>then I find out MODEL TYPE Series is not supprted in my simulator and it
>show syntax error. So the models are no more useful. Can I will do
>something else or put this 100ohm resistence by some otherway.
>
> [Series Pin Mapping] pin_2 model_name function_table_group
> VIA VIB rterm_100
>
> [Model] rterm_100
> C_comp 0.1pF 0.1pF 0.1pF
>
> Model_type Series
> |variable R(typ) R(min) R(max)
> [R Series] 100 80 120
>
> [Temperature Range] 25.00 125.00 0.00
> [Voltage Range] 1.800 1.60 1.950
>
>With best Regards
>Akhilesh
>Tom Dagostino wrote:
>
>
>
>>Model the inputs as a normal input buffer. Model the termination as a
>>series resistor between the two differential pins.
>>
>>Tom Dagostino
>>Teraspeed Consulting Group LLC
>>503-430-1065
>>tom@teraspeed.com
>>www.teraspeed.com
>>
>>-----Original Message-----
>>From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
>>Behalf Of Akhilesh CHANDRA
>>Sent: Tuesday, May 18, 2004 10:03 AM
>>To: ibis-users
>>Cc: Akhilesh CHANDRA
>>Subject: [IBIS-Users] How i use 100 ohm receiver resistence in my models
>>
>>
>>Hello Friends,
>>
>> I have LVDS RECEIVER cell in which a internal terminated 100ohm
>>resistence is present. How I will incorporate this resistence in my models.
>> When I validate my DRIVER and RECEIVER independently then everythis
>>is fine but when I use a TX line between the driver and reciver the
>>swing is reduce in my SPICE due to this 100ohm resistence and my SPICE
>>and IBIS result become differ.
>>
>>Regards
>>Akhilesh
>>
>>|------------------------------------------------------------------
>>|For help or to subscribe/unsubscribe, email majordomo@eda.org
>>|with just the appropriate command message(s) in the body:
>>|
>>| help
>>| subscribe ibis <optional e-mail address, if different>
>>| subscribe ibis-users <optional e-mail address, if different>
>>| unsubscribe ibis <optional e-mail address, if different>
>>| unsubscribe ibis-users <optional e-mail address, if different>
>>|
>>|or email a written request to ibis-request@eda.org.
>>|
>>|IBIS reflector archives exist under:
>>|
>>| http://www.eda.org/pub/ibis/email_archive/ Recent
>>| http://www.eda.org/pub/ibis/users_archive/ Recent
>>| http://www.eda.org/pub/ibis/email/ E-mail since 1993
>>
>>
>>
>>
>>
>>
>
>
>
>|------------------------------------------------------------------
>|For help or to subscribe/unsubscribe, email majordomo@eda.org
>|with just the appropriate command message(s) in the body:
>|
>| help
>| subscribe ibis <optional e-mail address, if different>
>| subscribe ibis-users <optional e-mail address, if different>
>| unsubscribe ibis <optional e-mail address, if different>
>| unsubscribe ibis-users <optional e-mail address, if different>
>|
>|or email a written request to ibis-request@eda.org.
>|
>|IBIS reflector archives exist under:
>|
>| http://www.eda.org/pub/ibis/email_archive/ Recent
>| http://www.eda.org/pub/ibis/users_archive/ Recent
>| http://www.eda.org/pub/ibis/email/ E-mail since 1993
>
>
>
>

-- 
Regards
Itzik Peleg 
Board Technology Group
************************************************************************
*** We have moved to our new location                                ***
*** Please update phone numbers and address                          ***
************************************************************************
Marvell Semiconductor Israel Ltd
6 Ha'mada St. Industrial Area
P.O.Box 692 Yokneam  20692  ISRAEL
Email - itzik.peleg@il.marvell.com
Tel   - +972 4  9091192  
Cell  - +972 54 4452482
Fax   - +972 4  9091501
WWW Page: http://www.marvell.com
========================================================================
This message may contain confidential, proprietary or legally privileged
information. The information is intended only for the use of the
individual
or entity named above. If the reader of this message is not the intended
recipient, you are hereby notified that any dissemination, distribution
or copying of this communication is strictly prohibited. If you have
received this communication in error, please notify us immediately by
telephone, or by e-mail and delete the message from your computer.
Thank you!
========================================================================
|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just the appropriate command message(s) in the body:
|
|  help
|  subscribe   ibis       <optional e-mail address, if different>
|  subscribe   ibis-users <optional e-mail address, if different>
|  unsubscribe ibis       <optional e-mail address, if different>
|  unsubscribe ibis-users <optional e-mail address, if different>
|
|or email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
|  http://www.eda.org/pub/ibis/email_archive/  Recent
|  http://www.eda.org/pub/ibis/users_archive/  Recent
|  http://www.eda.org/pub/ibis/email/          E-mail since 1993